CN102173149B - Antibacterial composite film used for vacuum packing of household articles and preparation method thereof - Google Patents
Antibacterial composite film used for vacuum packing of household articles and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an antibacterial composite film used for vacuum packing of household articles and a preparation method thereof. The composite film consists of a biaxially oriented polyamide film outer layer, a coating adhesion layer, and an antibacterial heat sealing layer. The preparation method comprises the following steps of: performing extrusion by using a three-layer co-extruder to obtain the antibacterial heat sealing layer; printing the outer film; and compounding the outer layer and the antibacterial heat sealing layer by using an extrusion compounding machine. The antibacterial composite film has excellent puncture resistance, compression strength and sealing property, good vacuum effect and antibacterial effect, and can used for storing the household articles and other antibacterial products.
Description
Technical field:
The present invention relates to plastic flexible package composite membrane and production technology field thereof, be specifically related to a kind of energy and be used for vacuum-packed antimicrobial compound film of household articles and preparation method thereof.
Background technology:
Along with the raising of national living standard, people are for household articles, as the condition of storage of the cotton-wadded quilt that changes according to the season, pillow, clothing etc. had new principle, require after the household articles collection shared space few, can keep for a long time clean health.Used household articles composite membrane does not still possess anti-microbial property, fold resistant poor fatigue properties, yielding, the easy gas leakage of composite membrane in the market.Therefore need the collection that the composite membrane of wanting vacuum tightness and anti-microbial property excellence is used for household articles badly, by vacuumizing, the volume of the household objects after the collection can be dwindled, compressive resistance is high, anti-crease property can be good, and can effectively prevent the formation of mould, guarantee that household articles stores convenient, healthy cleaning.This composite membrane is also applicable to the packing of other products.
Summary of the invention:
The invention provides a kind of energy and be used for vacuum-packed antimicrobial compound film of household articles and preparation method thereof, it is vacuum-packed that composite membrane of the present invention can be used for household articles.
The technical solution used in the present invention is as follows for achieving the above object:
A kind of energy is used for the vacuum-packed antimicrobial compound film of household articles, it is characterized in that: comprise successively from outside to inside two-way stretching polyamide film skin, extrusion coated adhesive layer, antibiotic hot sealing layer; Described extrusion coated adhesive layer is the hot melt film that has been coated with adhesive for polyurethane, and biaxial tension polyurethane film skin is combined closely with antibiotic hot sealing layer; Described antibiotic hot sealing layer is comprised of internal layer, middle level, skin from inside to outside successively;
Described antibiotic hot sealing layer:
Its internal layer comprises low density polyethylene (LDPE), middle density line property polyethylene, opening agent and antiseptic, and its weight ratio is: low density polyethylene (LDPE): middle density line property polyethylene: the ratio of opening agent is 3: (1-2): (0.01-0.05); Internal layer low density polyethylene (LDPE) melt index is that (0.5-1.5) gram/10 minutes, density are (0.918-0.925) g/cc; The melt index of middle density line property polyethylene is that (1.0-2.0) gram/10 minutes, density are (0.925-0.935) g/cc; It is antibacterial matrices that described antiseptic adopts the 1-3nm Nano Silver, is uniformly distributed in the described internal layer, and the content of Nano Silver is 200-350ppm in the antibiotic hot sealing layer;
Its skin is comprised of low density polyethylene (LDPE), LLDPE, the melt index of low density polyethylene (LDPE) is (0.5-2.0) gram/10 minutes, density is (0.918-0.925) g/cc, the LLDPE melt index is (0.5-1.0) gram/10 minutes, and density is (0.920-0.928) g/cc; Low density polyethylene (LDPE): LLDPE weight ratio=1: (1-2);
Its middle level comprises that high density polyethylene (HDPE), low density polyethylene (LDPE) form, the melt index of high density polyethylene (HDPE) is (1.5-1.8) gram/10 minutes, density is (0.950-0.958) g/cc, the melt index of low density polyethylene (LDPE) is (0.5-2.0) gram/10 minutes, and density is (0.918-0.925) g/cc; High density polyethylene (HDPE): low density polyethylene (LDPE) weight ratio=1: (1-2).
Described a kind of energy is used for the preparation method of the vacuum-packed novel antibacterial composite membrane of household articles, it is characterized in that: specifically may further comprise the steps:
(1) preparation of antibiotic hot sealing layer
(a) formula rate of pressing each layer of hot sealing layer is prepared burden;
(b) material for preparing is added extruder, plastify and extrude;
(c) material extruded of extruder is after inflation traction, vane cooling, herringbone clamping plate, the traction of rotation traction traction roller, sided corona treatment, and last rolling film makes antibiotic hot sealing layer, extrudes in the operation at material plasticizing, and barrel zone temperature is 130-170 ℃; Die temperature is 150-160 ℃;
(2) the outer field printing of two-way stretching polyamide film
The two-way stretching polyamide film skin is carried out the coating and printing of printing ink by intaglio press, and wherein the baking temperature of printing ink is 55 ± 5 ℃, and unwinding tension is 8 ± 2kg, and winding tension is 10 ± 2kg;
(3) extrude compound
(a) two-way stretching polyamide film that step (2) is printed is placed into as the first base material and extrudes on the compounding machine, and unwinding tension is 8 ± 2kg;
(b) adhesive for polyurethane is added in the glue groove coating adhesive proportioning: YH4501: ethyl acetate=10: 25;
(c) the first base material unreels, coating adhesive, coating mesh roller parameter: 170 line/inches, the ink cell degree of depth: 40um;
(e) extruding and hot melting film
Polyvinyl resin and firm AE are mixed the rear charging aperture that adds extruder, the weight ratio of polyvinyl resin and firm AE=(22-27): 5; Intensification extruding and hot melting film, barrel zone temperature a: district: 200 ± 5 ℃; Two districts: 265 ± 5 ℃; Three districts: 285 ± 5 ℃; Four districts: 300 ± 5 ℃; Five districts: 325 ± 5 ℃; Six districts: 335 ± 5 ℃; Seven districts: 340 ± 5 ℃; The temperature of getting to know is 340 ± 5 ℃;
(f) pressure-bearing is fitted
Antibiotic hot sealing layer unreels in the time of the extruding and hot melting film, through pressure roller two-way stretching polyamide film skin, hot melt film middle level and antibiotic hot sealing layer is fit together, and forms antimicrobial compound film;
(g) cooling and shaping, the antimicrobial compound film that step (f) forms is by circulating water, and wherein the temperature of recirculated cooling water is at 18 ± 2 ℃;
(h) cut edge;
(i) rolling gets finished product.
The present invention compared with prior art has following advantage:
Its puncture resistance of composite membrane of the present invention, compressive resistance, sealing property excellence, vacuum seal is effective, and by adding silver-series antibacterial agent content in the appropriate design hot sealing layer, antibacterial effect is good, can be as the packing of household articles and other antimicrobial product.
The specific embodiment
The present invention is described in detail below in conjunction with embodiment.
Two-way stretching polyamide skin of the present invention is produced by the Foshan Plastics Company, and index is: hot strength: transverse tensile strength 〉=250N/15mm, longitudinal tensile strength 〉=230N/15mm; Elongation at break is: transverse breakage percentage elongation 〉=70%, longitudinal fracture percentage elongation 〉=80%.
The used adhesive of extrusion coated adhesive layer is the YH4501 that Gao Meng company produces.
The outer used LDPE of antibiotic hot sealing layer of the present invention is produced by Shandong fossil company, and index is: melt index (restraining/10 minutes): 0.5-2.0, density (g/cc): 0.918-0.925;
Outer used LLDPE produces by raising sub-petro-chemical corporation, and index is: melt index (restraining/10 minutes): 0.5-1.0, density (g/cc): 0.920-0.928
The used HDPE in middle level is produced by Exxon Mobil Corporation, and index is: melt index (restraining/10 minutes): 1.5-1.8, density (g/cc): 0.950-0.958;
The used LDPE in middle level produces by raising sub-petro-chemical corporation, and index is: melt index (restraining/10 minutes): 0.5-2.0, density (g/cc): 0.918-0.925;
The used LDPE of internal layer is by Qilu Petrochemical Company production, and index is: melt index (restraining/10 minutes): 0.5-1.5, density (g/cc): 0.918-0.925;
The used MDPE of internal layer is produced by Dow Chemical, and index is: melt index (restraining/10 minutes): 1.0-2.0, density (g/cc): 0.925-0.935;
Opening agent is produced by Aaron's intelligence connection company.
Nano Silver is antibiotic pellet, nanometer silver antimicrobial composition valid density content: 200-350ppm, and particle diameter: 1-3nm, real Chemical Industry Science Co., Ltd produces by the Shanghai favour.
" antibiotic plastic-anti-microbial property test method and antibacterial effect detect antibiotic rate of the present invention according to QB/T 2591-2003.
Heat seal strength detects according to QB/T 2358-1998 " plastic sheeting complex pocket heat sealing strength test method " standard;
Peel strength detects according to GB 8808-1988 standard;
Hot strength detects according to GB 13022 standards;
Elongation at break detects according to the GB13022 standard;
Anti-pendulum impulsive force detects according to the GB8809-1988 standard.
Embodiment 1:
The preparation section that a kind of energy is used for the vacuum-packed novel antibacterial composite membrane of household articles is followed successively by: the 1) preparation of antibiotic heat-sealing film; 2) printing process of two-way stretching polyamide film; 3) extrude compound working procedure.
The preparation technology of antibiotic heat-sealing film comprises that burden process, material plasticizing are extruded operation, inflation draws operation, vane refrigerating work procedure, herringbone clamping plate operation, rotation traction traction roller traction operation, sided corona treatment operation, film take-up operation.
In upper material process:
Outer LDPE: the LLDPE=1 that adopts: 1 formulation weight ratio blend;
HDPE: LDPE=1 is adopted in the intermediate layer: 1 formulation weight ratio blend;
Internal layer adopts LDPE, MDPE, opening agent, antiseptic=3: 1: 0.05: 0.05 formulation weight ratio blend;
Extrude in the operation at material plasticizing, barrel zone temperature is made as 4 thermals treatment zone, is respectively: a district: 135 ℃; Two districts: 155 ℃; Three districts: 155 ℃; Four districts: 160 ℃; Die head temperature is respectively: 155 ℃ of mouthful mould thermals treatment zone; Die head temperature is made as 4 districts, is respectively heating one district's temperature: 150 ℃; 152 ℃ of die head heating two district's temperature; 150 ℃ of die head heating three district's temperature; 155 ℃ of die head heating four district's temperature; Extrusion machine fused mass pressure is respectively corona layer: 36.4MPa, the intermediate layer: 35.8MPa, hot sealing layer: 29.0MPa.
In extruding compound working procedure: polyvinyl resin and firm AE are mixed the rear charging aperture that adds extruder, the weight ratio of polyvinyl resin and firm AE=(22-27): 5; Intensification extruding and hot melting film, barrel zone temperature a: district: 200 ± 5 ℃; Two districts: 265 ± 5 ℃; Three districts: 285 ± 5 ℃; Four districts: 300 ± 5 ℃; Five districts: 325 ± 5 ℃; Six districts: 335 ± 5 ℃; Seven districts: 340 ± 5 ℃; Die head temperature is 340 ± 5 ℃; Resin temperature is controlled at 335 ℃ in the extruding and hot melting membrane process; When the circulating cooling temperature is controlled at 18 ℃, with the coating basement membrane compound after, peel strength 〉=3.0N/15mm.
Embodiment 2:
Except skin adopts LDPE: LLDPE=1: 1.5 formulation weight ratio blend;
HDPE: LDPE=1 is adopted in the intermediate layer: 1.0 formulation weight ratio blend;
Internal layer adopts LDPE, MDPE, opening agent, antiseptic=3: 1.5: 0.05: outside 0.08 the formulation weight ratio blend, all the other are identical with embodiment 1.
Embodiment 3:
Except skin adopts LDPE: LLDPE=1: 1.5 formulation weight ratio blend;
HDPE: LDPE=1 is adopted in the intermediate layer: 1.5 formulation weight ratio blend;
Internal layer adopts LDPE, MDPE, opening agent, antiseptic=3: 1.5: 0.05: 0.08 formulation weight ratio blend;
In extruding compound working procedure: resin temperature is controlled at 340 ℃ in the extruding and hot melting membrane process, when the circulating cooling coolant-temperature gage is controlled at 18 ℃, with the coating basement membrane compound after, peel strength is better.
Embodiment 4:
Except skin adopts LDPE: LLDPE=1: 1.5 formulation weight ratio blend;
HDPE: LDPE=1 is adopted in the intermediate layer: 1.6 formulation weight ratio blend;
Internal layer adopts LDPE, MDPE, opening agent, antiseptic=1: 1.5: 0.01: outside 0.12 the formulation weight ratio blend, all the other are identical with embodiment 3.
Embodiment 5:
Except skin adopts LDPE: LLDPE=1: 2.0 formulation weight ratio blend;
HDPE: LDPE=1 is adopted in the intermediate layer: 2.0 formulation weight ratio blend;
Internal layer adopts LDPE, MDPE, opening agent, antiseptic=1: 2.0: 0.01: 0.14 formulation weight ratio blend;
In extruding compound working procedure: resin temperature is controlled at 345 ℃ in the extruding and hot melting membrane process, when the circulating cooling temperature is controlled at 20 ℃, is easy to form the uniform film of thickness, with the coating basement membrane compound after, peel strength is good.
Embodiment 6
Except skin adopts LDPE: LLDPE=1: 1.5 formulation weight ratio blend;
HDPE: LDPE=1 is adopted in the intermediate layer: 1.8 formulation weight ratio blend;
Internal layer adopts LDPE, MDPE, opening agent, antiseptic=1: 2.0: 0.01: outside 0.14 the formulation weight ratio blend, all the other are identical with embodiment 5.
The internal layer of hot sealing layer adopts this prescription, and opening agent content reduces relatively, and antiseptic and polyvinyl resin syncretizing effect are optimum, and heat sealability obviously strengthens, and can guarantee its vacuum tightness.
Testing result is as shown in table 1:
Printing appearance requirement such as table 2:
Embodiment 6 prepared composite membranes are placed on indoor, respectively at detecting its antibiotic rate in 10 days, 15 days, its 10 days, 15 days antibiotic rate is all greater than 99.9%, and flat appearance is non-wrinkle.
Claims (2)
1. one kind can be used for the vacuum-packed antimicrobial compound film of household articles, it is characterized in that: comprise successively from outside to inside two-way stretching polyamide film skin, extrusion coated adhesive layer, antibiotic hot sealing layer; Described extrusion coated adhesive layer is the hot melt film that has been coated with adhesive for polyurethane, and the two-way stretching polyamide film skin is combined closely with antibiotic hot sealing layer; Described antibiotic hot sealing layer is comprised of internal layer, middle level, skin from inside to outside successively;
Described antibiotic hot sealing layer:
Its internal layer comprises low density polyethylene (LDPE), middle density line property polyethylene, opening agent and antiseptic, and its weight ratio is: low density polyethylene (LDPE): middle density line property polyethylene: the ratio of opening agent is 3:(1-2): (0.01-0.05); Internal layer low density polyethylene (LDPE) melt index is that (0.5-1.5) gram/10 minutes, density are (0.918-0.925) g/cc; The melt index of middle density line property polyethylene is that (1.0-2.0) gram/10 minutes, density are (0.925-0.935) g/cc; It is antibacterial matrices that described antiseptic adopts the 1-3nm Nano Silver, is uniformly distributed in the described internal layer, and the content of Nano Silver is 200-350ppm in the antibiotic hot sealing layer;
Its skin is comprised of low density polyethylene (LDPE), LLDPE, the melt index of low density polyethylene (LDPE) is (0.5-2.0) gram/10 minutes, density is (0.918-0.925) g/cc, the LLDPE melt index is (0.5-1.0) gram/10 minutes, and density is (0.920-0.928) g/cc; Low density polyethylene (LDPE): the LLDPE weight ratio=1:(1-2);
Its middle level comprises that high density polyethylene (HDPE), low density polyethylene (LDPE) form, the melt index of high density polyethylene (HDPE) is (1.5-1.8) gram/10 minutes, density is (0.950-0.958) g/cc, the melt index of low density polyethylene (LDPE) is (0.5-2.0) gram/10 minutes, and density is (0.918-0.925) g/cc; High density polyethylene (HDPE): the low density polyethylene (LDPE) weight ratio=1:(1-2).
2. a kind of energy as claimed in claim 1 is used for the preparation method of the vacuum-packed antimicrobial compound film of household articles, it is characterized in that: specifically may further comprise the steps:
(1) preparation of antibiotic hot sealing layer
(a) formula rate of pressing each layer of hot sealing layer is prepared burden;
(b) material for preparing is added extruder, plastify and extrude;
(c) material extruded of extruder is after inflation traction, vane cooling, herringbone clamping plate, the traction of rotation traction traction roller, sided corona treatment, and last rolling film makes antibiotic hot sealing layer, extrudes in the operation at material plasticizing, and barrel zone temperature is 130-170 ℃; Die temperature is 150-160 ℃;
(2) the outer field printing of two-way stretching polyamide film
The two-way stretching polyamide film skin is carried out the coating and printing of printing ink by intaglio press, and wherein the baking temperature of printing ink is 55 ± 5 ℃, and unwinding tension is 8 ± 2kg, and winding tension is 10 ± 2kg;
(3) extrude compound
(a) two-way stretching polyamide film that step (2) is printed is placed into as the first base material and extrudes on the compounding machine, and unwinding tension is 8 ± 2kg;
(b) adhesive for polyurethane is added in the glue groove coating adhesive proportioning: YH4501: ethyl acetate=10:25;
(c) the first base material unreels, coating adhesive, coating mesh roller parameter: 170 line/inches, the ink cell degree of depth: 40um;
(e) extruding and hot melting film
Polyvinyl resin and firm AE are mixed the rear charging aperture that adds extruder, the weight ratio of polyvinyl resin and firm AE=(22-27): 5; Intensification extruding and hot melting film, barrel zone temperature a: district: 200 ± 5 ℃; Two districts: 265 ± 5 ℃; Three districts: 285 ± 5 ℃; Four districts: 300 ± 5 ℃; Five districts: 325 ± 5 ℃; Six districts: 335 ± 5 ℃; Seven districts: 340 ± 5 ℃; Die head temperature is 340 ± 5 ℃;
(f) pressure-bearing is fitted
Antibiotic hot sealing layer unreels in the time of the extruding and hot melting film, through pressure roller two-way stretching polyamide film skin, hot melt film middle level and antibiotic hot sealing layer is fit together, and forms antimicrobial compound film;
(g) cooling and shaping, the antimicrobial compound film that step (f) forms is by circulating water, and wherein the temperature of recirculated cooling water is at 18 ± 2 ℃;
(h) cut edge;
(i) rolling gets finished product.
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| CN112659702A (en) * | 2020-12-22 | 2021-04-16 | 黄山永新股份有限公司 | High-humidity-resistance polyethylene film and production method thereof |
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